\begin{tikzpicture}
  \begin{scope}[x=0.7cm, y=0.7cm, step=0.7cm, thick]
    \board{6}{6};  
    \qb{(2,1)};
    \qb{(2,5)};
    \qb{(4,4)};
    \qb{(6,5)};
    \qw{(2,3)};
    \qw{(3,4)};
    \qw{(4,3)};
    \qw{(6,2)};
    \arrow{(1,2)};
    \arrow{(1,6)};
    \arrow{(2,2)};
    \arrow{(2,4)};
    \arrow{(3,1)};
    \arrow{(3,2)};
    \arrow{(3,5)};
    \arrow{(3,3)};
    \arrow{(4,5)};
    \arrow{(5,2)};
    \arrow{(5,3)};
    \arrow{(5,5)};
    \arrow{(6,3)};
    \draw [blue] (0,0) rectangle (2,1); % black territory
    \draw [blue] (-0.1, 1.9) -- (-0.1, 6.1) -- (6.1, 6.1) --
                 (6.1, -0.1) -- (2.9, -0.1) -- (2.9, 1.9) -- cycle; % big active
    \draw [red, dashed] (3,0) rectangle (6,3); % white blocker territory
    \draw [red, dashed] (0,2) rectangle (6,6); % small active
  \end{scope}
\end{tikzpicture}

